28078732603 has 4 divisors (see below), whose sum is σ = 29299547088. Its totient is φ = 26857918120.

The previous prime is 28078732579. The next prime is 28078732613. The reversal of 28078732603 is 30623787082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28078732603 - 2¹³ = 28078724411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28078732613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610407208 + ... + 610407253.

It is an arithmetic number, because the mean of its divisors is an integer number (7324886772).

Almost surely, 2^28078732603 is an apocalyptic number.

28078732603 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28078732603 is a deficient number, since it is larger than the sum of its proper divisors (1220814485).

28078732603 is a wasteful number, since it uses less digits than its factorization.

28078732603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220814484.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 28078732603 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-two thousand, six hundred three".